suspect可數嗎

　　Doctors suspect he may have a heart condition.

　　醫生懷疑他可能有心臟病。

　　I suspect there may be something funny going on.

　　我懷疑可能有某種非法勾當在進行中。

　　After hours of questioning, the suspect confessed.

　　經過數小時的審問后，嫌疑犯終于招供。